California and New York, home to Silicon Valley and Wall Street, are preparing to write rules of the road for entrepreneurs driving a surge of interest in Bitcoin and other virtual currencies.The outcome could determine how big a threat Bitcoin poses to established payment companies including JPMorgan Chase & Co. and Visa Inc. as well as where venture capital and talent converge to form a geographic hub for U.S. startups.“If a state becomes Bitcoin-friendly, it will see a huge increase in companies,” said Adam Ettinger, an attorney with San Francisco-based Strategic Counsel Corp., which advises technology investors. “That will mean the brightest minds working on some of the most innovative payment technology we’ve seen in awhile.”Bitcoin, a five-year-old protocol for issuing and moving money across the Internet, has gained traction with merchants selling everything from Sacramento Kings basketball tickets to kitchen mixers on Overstock.com. Venture capitalists see promise in it as an alternative to the global payment system currently dominated by companies including Visa, Western Union Co. (WU) and large banks.